Crystal vial

The crystal vial (called a vial in Heretic and Hexen manuals) is a small floating glass bottle containing an unknown blue liquid. Restores 10% of the player's health when picked up. Crystal vials were introduced in Heretic and returned in Hexen. They are equivalent to Doom's stimpack. Hexen II manual states that the vials are too fragile to be carried around like the Quartz Flasks and should therefore be used immediately.

This item is not counted in the items percentage displayed at the end of each level in Heretic.

Appearance statistics
In the Heretic IWADs the crystal vial is first encountered on these maps per skill level:

The Heretic IWADs contain the following numbers of crystal vials per skill level:

In the Hexen IWADs the crystal vial is first encountered on these maps per skill level:

The Hexen IWADs contain the following numbers of crystal vials per skill level:

Other games
The same item reappears in Hexen II under the name "Healing Vial" and in  under the name "Health Vial".